Bottle-stopper and pipette.



c. SIMPSON. BOTTLE STOPPER AND PIPETTE.

' APPLICATION FILED NOV. I. I915. 1,303,919.

Patented Nov. 7. 1916.

[RUG 77/607" Giza/2 2,65 Azrnpsmz.

CHARLES ASBURY SIMlPSON, OF BOSTON, MASSACHUSETTS.

Specification of Letters Patent.

Patented Nov. *7, 1916.

Application filed November 1, 1915. Serial No. 59,058.

To all whom it may concern Be it known that 1, CHARLES AsBURY SIMPSON, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Bottle- Stoppers and Pipettes, of which the followis-a specification. 1

My invention relates to pipette bottles and is an improvement upon that class of pipette bottles in which the pipette has a member which, as a whole, serves as a stopper fora bottle and as a means for removing l1qu1d from said bottle.

For ordinary liquids the pipette in use is adapted to fit the neck of a bottle by means of cork or rubber. For chemical reagents, caustic and corrosive liquids and various solvents, it is necessarythat all partsof the p1- pette and stopper with which the l1qu1d may .come in contact should be of glass or porcelain. To meet these requirements a glass pipette of suflicient length to reach the bottom of the bottle is sometimes enlarged in its central upper portion to form a conical plug or stopper which is ground to fit the neck of a bottle as in the ordinary glass stopper and no cork or rubber is used excepting a small rubber bulb or equivalent at the extreme upper end of the pipette for the purpose of applying suction. It is to th1s speclal class of pipette bottles that my inventlon belongs and to which the improvements of my 1nvention over the prior art devices are d1- rected.

In using pipettebottles as heretofore constructed the stopper for thebottle and the member whereby suction is applied to rea move liquid from the bottle are made in one piece which it is always necessary to remove from the bottle and which serves not only as a stopper for the bottle in the sense of the ordinary bottle stopper, but also serves the function of removing liquid from the bottle. The disadvantage of such a con struction is that there is great liability to upset the bottle and spill the contents as well as danger of contamination of the liquid contents of the bottle by frequent removals and insertions o-flthepipette. Also it is necessaryv in this class of pipette bottles to em- .ploy both hands, one to hold the bottle and one to remove the pipette from the bottle.

-To obviate these disadvantages I have invented a new;and improved form of pipette provide ashorter and more convenient form .of: pipette; third, to enable the-use of a pipette by the employment of one hand only; fourth, to provide a convenient holder for the pipette when the same is not in use; fifth, to provide a small bowl in the stopper as a receptacle for small amounts of liquid removed from the bottle by the pipette; sixth, to provide means for using a single small pipette for bottles of various heights.

Having these objects in view, therefore, my invention consists in a pipette formed in two parts, one of said parts forming a stopper adapted to fit the neck of a bottle and having a tubular portion extending there from to the bottom of the bottle, all as set forth in the following specification and particularly pointed out in the claims thereof.

Referring to the drawings: Figure l is a sectional elevation of a bottle with my improved stopper and pipette shown in connection therewith. Fig. 2 is a side elevation of the stopper and tubular extension. Fig. 3 is a side elevation of the pipette.

- Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5 is a bottle of any suitable form having a neck 6 to receive the stopper 7. Said stopper embodies an upper part or head 8 which is circular in cross section and is of convenient size for grasping with the thumb and finger when inserting or removing the stopper from the bottle. The head 8 has a central portion hollowed out to form a small bowl-shaped cavity or chamber 9. The chamber 9 forms a convenient receptacle for holding small portions of liquids when removed from the bottle by the pipette.

The intermediate portion 10 of the stopper is preferably conical in form on its periphery in order that it may fit the neck of sure. The lower end of the stopper is perforated along its longitudinal axis by a hole 18 is of suflicient length .to reach the bottom of the bottle when the stopper is inserted in the neck of the bottle said extension should also have a small bore of to in diameter to give the best results. This tubular extension of the stopper may be formed in one piece where the stopper is formed of glass. \Vhile I prefer to make said stoppers of glass, they may be made of porcelain, hard rubber, aluminum, or a combination of materials may be used in which a cork or rubber covering is utilized to cover the exterior of the conical portion 10 of the stopper, but where the stopper is used for chemical or medicinal agents it is necessary that the same should be formed entirely of glass, porcelain or some rigid material which is resistant to the action of said chemical or medicinal agent.

13 is a pipette formed in accordance with my invention and consists of a conical tip lat which is formed to fit accurately within the conical bore portion 12 of the stopper 7. The conical tip M is formed to fit accurately within the conical chamber 12 so as to form a continuous and practically air-tight connection with the extension tube 18, and its length should preferably be only slightly more than the depth of the chamber 12. The

mutual conformation and adaptation of the conical portion 14: of the pipette and of the chamber 12, together with the size of the extension tube 18, determines the successful operation of this device. By varying the length of the extension tube 18' bottles of various depths may be used without changing the size or length of the pipette, and it will be noted that said extension 18 forms a continuation of'the pipette tube 14 when the pipette is inserted in the chamber 12. The conical portion let of the pipette extends downwardly from a bulb 15 and a cylindrical stem 16 extends upwardly from said bulb to receive a collapsible bulb 17, preferably formed of rubber. The bulb 15 should be of suflicient size to contain all of the liquid sucked up by the operation and prevent any from entering the rubber bulb 17.

It will be seen that the pipette of myinvention is much shorter and more convenient for use than the pipettes ordinarily used. It will thus be seen that the stopper hereinhefores-specifically described has a bore ex- I tight closure.

forming a chamber. It will be seen that by 7 thus separating the pipetteas a Whole into two parts, namely, the stopper portion and the auxiliary stopper or pipette portion, the advantages hereinbefore set forth are secured and the pipette is much shorter and more convenient to use than pipettes heretofore required for similar purposes,'namely, for the removal of small amounts of liquids from bottles. 7 e

In using the invention hereinbefore set forth, the stopper 7 with its tubular extens sion 18 is inserted in the neck 60f thebottle 5 tightly enough to form a liquid and airlVhen so inserted no liquid can escape when the bottle is tipped over, or even inverted, as the bore 11 of the tubular extension 18 of the stopper and the bore 11 in the main body portion of the stopper 7 are so small in diameter that liquid is held in the'bottle by pressure of the outside air. 7

The rubber bulb '17 of the pipette is compressed by the thumb and finger of the user ing the bulb the air pressure in the. bottle" forces the liquid up into the pipette. V

This formof pipette bottle acts by suction or compression or both combinedi The liquid drawn up into the pipette may, if desired, be delivered into the bowl-shaped cavity 9 in the head ofthe stopper, where it will remain and not flow back into the bottle, being held by the air pressure within the bottle. This bowl-shaped cavity, therefore, furnishes a very convenient receptacle for moistening pellets of cotton, or inserting liquid remaining in the bowl 9 can be sucked up by the pipette and thrown away or. the

pipette with liquid contents may be inserted in the stopper which serves as a pipette holder and the liquidremainsin the pipette securely sealedfrom the air until wanted. 7

This form of pipette isespecially convenient for medicinal purpos 1 I lVhile I have described the intermediate cal shape,such, for instance, as to assume, theshape of a COIlOlCl. without departing 7 from the spirit of my invention. 7

Having thus described my invention, what I claim and desire by Letters Patent to secure is:

1. In combination, a bottle, a stopper for said bottle made of rigid material with a conical chamber formed on the longitudinal axis of said stopper, a tubular extension from the lower end of said chamber to the bottom of said bottle and a pipette having a conical tip formed to fit said chamber.

2. In combination, a bottle, a stopper for said bottle made of rigid material having a bore extending therethrough and comprising a conical chamber in its intermediate portion, a tubular lower portion and an enlarged bowl-shaped upper portion and a pipette, having a portion thereof formed to fit into said conical chamber of said stopper and having an enlarged central portion forming a bulb.

In combination, a bottle and a tubular pipette extension having its upper part enlarged to form a conical stopper fitting the neck of said bottle, the bore of said tube enlarged within its upper part to form two connected chambers, the uppermost chamber being bowl-shaped and the lower chamber being conical-shaped and a pipette having its lower part formed as a conical tip and its middle portion enlarged to form a bulb, said conical tip being constructed to fit within said lower chamber in said tubular pipette extension, whereby a continuation or extension of the pipette to the bottom of the bottle for the purpose of sucking up into the pipette and removing from the bottle portions of the liquid contents is formed.

4. In combination, a bottle and a pipette in two parts, one part forming a permanent stopper constructed to fit the neck of said bottle and having a conical bore with a tubular extension projecting from its lower end to the bottom of said bottle, the other part of said pipette constituting an auxiliary stopper and comprising a member having a conical tip constructed to fit said conical bore and an enlarged central portion forming a chamber, the upper end of said member terminating in a tubular extension and a collapsible bulb attached to said tubular extension.

5. In combination, a stopper for a bottle having a conical bore and a tubular extension projecting from its lower end of substantial length and adapted to extend to the bottom of said bottle, and a pipette having a conical tip constructed to fit said conical bore and an enlarged central portion forming a chamber, the upper end of said pipette terminating in a tubular extension and a collapsible bulb attached to said tubular extension.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES ASBURY SIMPSON.

Witnesses:

SYDNEY E. TAFT, ANNIE J. DAlLEY.

Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents, Washington, D. G. 

